Não informado. (2020). Memoirs of the Geological Survey of Great Britain. Her Majesty's Stationery Office.
Lua i Stíl Chicago (17ú heag.)Não informado. Memoirs of the Geological Survey of Great Britain. London: Her Majesty's Stationery Office, 2020.
Lua MLA (8ú heag.)Não informado. Memoirs of the Geological Survey of Great Britain. Her Majesty's Stationery Office, 2020.
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